Phosphorus and Potassium Uptake by Corn in Conservation Tillage Systems

Mackay, A. D.; Kladivko, E. J.; Barber, S. A.; Griffith, D. R.

doi:10.2136/sssaj1987.03615995005100040027x

Cited by 53 publications

(36 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, with increasing fertilizer rates soil P test levels increased in the 10-to 20-cm depth increment of STDB but no changes occurred for the broadcast treatments. Th e increase in soil P test levels at the soil surface, especially when P applications exceed seed removal by the crop, is a well-recognized eff ect of broadcast applications (Shear and Moschler, 1969;Mackay et ., 1987;Holanda et al, 1998;Mallarino and Borges, 2006). Results for deep banding of P also illustrate the possibility to reduce soil surface P test levels while increasing them at the subsurface.…”

Section: Resultsmentioning

confidence: 99%

Assessment of Soil Phosphorus and Potassium following Real Time Kinematic‐Guided Broadcast and Deep‐Band Placement in Strip‐Till and No‐Till

Fernández

Schaefer²

2012

Soil Science Soc of Amer J

View full text Add to dashboard Cite

Fertilizer placement may cause non‐uniform nutrient distribution in the soil, making it difficult to determine whole‐field fertility by traditional sampling strategies. Our objectives were to determine P and K distribution after repeated applications in no‐till and strip‐till soils and to develop improved sampling procedures to estimate soil P and K levels on a corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] rotation with crops planted at 76‐cm row spacing. Three trials near Pesotum, IL, received blends of 0–0, 22–42, 33–62, 44–83, 55–104, 66–125, and 77–145 kg P–K ha−1 in fall 2007 and 2009 before corn planting. Applications were broadcast‐applied in no‐till (NTBC) and strip‐till (STBC) and deep‐banded in strip‐till (STDB) 15 cm below the surface in the crop row (IR) using real‐time kinematic (RTK) satellite navigation. Every year soil P and K was measured at 10‐cm increments to a 30‐cm depth at 0, 19, 38, and 57 cm from the IR. Subsurface banding reduced P and K levels in the surface and increased them at the point of application, or deeper with the highest rate, while broadcast applications increased surface levels. Soil‐surface K levels were greater at IR likely because of K leaching from senescing standing crops. Soil‐test results indicated no need to adjust fertilizer rate based on tillage or fertilizer placement. A sampling ratio of 1:3 IR to between the crop rows (BR) seemed adequate to estimate soil fertility across a wide range of P‐ and K‐fertilizer rates and soil test levels where the location of the fertilizer band or planting row is maintained constant.

show abstract

Section: Resultsmentioning

confidence: 99%

Assessment of Soil Phosphorus and Potassium following Real Time Kinematic‐Guided Broadcast and Deep‐Band Placement in Strip‐Till and No‐Till

Fernández

Schaefer²

2012

Soil Science Soc of Amer J

View full text Add to dashboard Cite

show abstract

“…The collected samples were put in plastic bags and stored at 4°C until measured. Root sampling and length measurements were similar to that of Mackay et al, 1987. Root length measurements were subjected to analysis of variance. Where the F-test was significant a Bayes Least Significant Difference (BLSD) was calculated using a K-ratio of 100 or 50, comparable to 5% and 10% confidence (Smith, 1978).…”

Section: Experiments 2: Usa Field Trialsmentioning

confidence: 99%

Sorghum root length density and the potential for avoiding striga parasitism

1990

View full text Add to dashboard Cite

Striga hermonthica is a serious root parasite of sorghum in the semiarid tropics. Successful parasitism is dependent on interactions of Striga seeds and host roots. Several sorghum cultivars have been found which resist parasitism. The basis of resistance is not well known. One possible method for reducing the chances of parasitism is by restricted host root development. This research was conducted to evaluate this hypothesis in sorghum known to possess resistance to parasitism by Striga.Root length density of 21-day-old pot-grown resistant cultivars, Framida, N-13, IS-9830, Tetron and P-967083, were compared to that of the susceptible check, Dabar, using the line intercept method of measuring root length. There was no significant difference between resistant cultivars and the susceptible cultivar Dabar. The RLD of resistant P-967083 however was significantly less than Framida, another resistant cultivar.The RLD of Dabar was compared to that of Framida and P-967083 in USA and Niger field trials. Root length density was determined on soil cores taken at flowering with a Giddings Soil Sampler. Each core was divided into 10-cm fractions for estimating RLD by the line intercept method. In the USA Dabar had significantly greater RLD than the two resistant cultivars in the upper 10-cm portion of the soil profile, but only significantly greater than P-967083 in the 10-20-cm portion. Significant differences in RLD between susceptible and resistant cultivars were not found at depths between 20-60 cm. In field trials in Niger, RLD of Dabar was significantly greater than either resistant cultivar in the (0 to 30 cm) portion of the soil core.These results suggest that part of the Striga resistance of P-967083 and perhaps Framida may be a result of avoiding interactions between parasitic seeds and host roots.

show abstract

“…Phosphorus accumulation due to local fertilizer applications in NT results in concentrations of roots near the surface and along the rows (Mackay et al, 1987;Klepker & Anghinoni, 1993). On the other hand, extremely high soil P concentrations can cause deleterious effects to plants by increasing the osmotic pressure that damages the root apical meristem (Barber, 1995).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus and root distribution and corn growth as related to long-term tillage systems and fertilizer placement

Costa

Souza

Anghinoni

et al. 2009

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

SUMMARYSoil and fertilizer management during cultivation can affect crop productivity and profitability. Long-term experiments are therefore necessary to determine the dynamics of nutrient and root distribution as related to soil profile, as well as the effects on nutrient uptake and crop growth. An 18-year experiment was conducted at the Federal University of Rio Grande do Sul State (UFRGS), in Eldorado do Sul, Brazil, on Rhodic Paleudult soil. Black oat and vetch were planted in the winter and corn in the summer. The soil management methods were conventional, involving no-tillage and strip tillage techniques and broadcast, rowand strip-applied fertilizer placement (triple superphosphate). Available P (Mehlich-1) and root distribution were determined in soil monoliths during the corn grain filling period. Corn shoot dry matter production and P accumulation during the 2006/2007 growing season were determined and the efficiency of P utilization calculated. Regardless of the degree of soil mobilization, P and roots were accumulated in the fertilized zone with time, mainly in the surface layer (0-10 cm). Root distribution followed P distribution for all tillage systems and fertilizer treatments. Under no-tillage, independent of the fertilizer placement, the corn plants developed more roots than in the other tillage systems. Although soil tillage systems and fertilizer treatments affected P and root distribution throughout the soil profile, as well as P absorption and corn growth, the efficiency of P utilization was not affected. Index-terms: soil tillage, P fertilization, utilization efficiency.( RESUMO: DISTRIBUIÇÃO DE FÓSFORO E RAÍZES E CRESCIMENTO DO MILHO EM SISTEMAS DE MANEJO DO SOLO E MODOS DE APLICAÇÃO DE FERTILIZANTE NO LONGO PRAZO

show abstract

Phosphorus and Potassium Uptake by Corn in Conservation Tillage Systems

Cited by 53 publications

References 0 publications

Assessment of Soil Phosphorus and Potassium following Real Time Kinematic‐Guided Broadcast and Deep‐Band Placement in Strip‐Till and No‐Till

Assessment of Soil Phosphorus and Potassium following Real Time Kinematic‐Guided Broadcast and Deep‐Band Placement in Strip‐Till and No‐Till

Sorghum root length density and the potential for avoiding striga parasitism

Phosphorus and root distribution and corn growth as related to long-term tillage systems and fertilizer placement

Contact Info

Product

Resources

About